Permanent Shadow

Planning authorities often request studies on the impact of proposed development on open spaces - gardens, courtyards and public open spaces.


BRE Criterion

The BRE state that 'It is suggested that, for it to appear adequately sunlit throughout the year, no more than two-fifths and preferably no more than a quarter of any garden or amenity area should be prevented by buildings from receiving any sun at all on 21 March. If, as a result of new development, an existing garden or amenity area does not meet these guidelines, and the area which can receive some sun on 21 March is less than 0.8 times its former value, then the loss of sunlight is likely to be noticeable.'

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